MAX9516ALB+T Maxim Integrated Products, MAX9516ALB+T Datasheet - Page 7

• Manufacturer Part Number: MAX9516ALB+T
• Description: IC VIDEO FILTER AMP 1.8V 10-UDFN
• Manufacturer: Maxim Integrated Products
• Series: DirectDrive™r

Specifications of MAX9516ALB+T

• Applications: Reconstruction Filter
• Number Of Circuits: 1
• Current - Supply: 3.1mA
• Current - Output / Channel: 81mA
• Voltage - Supply, Single/dual (±): 1.7 V ~ 2.63 V
• Mounting Type: Surface Mount
• Package / Case: 10-µDFN
• Number Of Channels: 1
• Supply Current: 3.1 mA
• Minimum Operating Temperature: - 40 C
• Maximum Operating Temperature: + 125 C
• Maximum Power Dissipation: 403 mW
• Mounting Style: SMD/SMT
• Supply Voltage (max): 2.625 V
• Supply Voltage (min): 1.7 V
• No. Of Amplifiers: 1
• Gain Bandwidth: 5MHz
• Supply Voltage Range: 1.7V To 2.625V
• Output Current: 81mA
• Amplifier Output: Single Ended
• Operating Temperature Range: -40°C To +125°C
• Rohs Compliant: Yes
• For Use With: MAX9516EVKIT+ - KIT EVAL FOR MAX9516
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: MAX9516ALB+T; MAX9516ALB+TTR

The MAX9516 represents Maxim’s second-generation
of DirectDrive video amplifiers, which meet the require-
ments of current and future portable equipment:
• 1.8V operation. Engineers want to eliminate the 3.3V
• Lower power consumption. The MAX9516 reduces
• Internal fixed gain of 8. As the supply voltages drop
• Active-detect mode reduces power consumption.
DirectDrive technology is necessary for a voltage-mode
amplifier to output a 2V
supply. The integrated inverting charge pump creates
a negative supply that increases the output range and
gives the video amplifier enough headroom to drive a
2V
Integrated video filter amplifier circuits operate from a
single supply. The positive power supply usually cre-
ates video output signals that are level-shifted above
ground to keep the signal within the linear range of the
output amplifier. For applications where the positive DC
level is not acceptable, a series capacitor can be
inserted in the output connection in an attempt to elimi-
supply in favor of lower supply voltages.
average power consumption by up to 75% com-
pared to the 3.3V first-generation devices (MAX9503/
MAX9505).
for system chips on deep submicron processes, the
video DAC can no longer create a 1V
output, and the gain of 2 found in the previous gen-
eration of video filter amps is not enough.
P-P
PIN
10
1
2
3
4
5
6
7
8
9
video signal with a 150Ω load.
CPGND
NAME
SHDN
LOAD
GND
OUT
C1N
C1P
V
V
_______________________________________________________________________________________
IN
DD
SS
Video Filter Amplifier with Load Detect
Detailed Description
P-P
Charge-Pump Negative Power Supply. Bypass with a 1µF capacitor to GND.
Charge-Pump Flying Capacitor Negative Terminal. Connect a 1µF capacitor from C1P to C1N.
Charge-Pump Ground
Charge-Pump Flying Capacitor Positive Terminal. Connect a 1µF capacitor from C1P to C1N.
Positive Power Supply. Bypass with a 0.1µF capacitor to GND.
Load-Detect Output. LOAD goes high when an output video load is detected.
Ground
Video Input
Active-Low Shutdown. Connect to V
Video Output
video signal from a 1.8V
1.8V, Ultra-Low-Power, DirectDrive
P-P
DirectDrive
Background
signal at its
DD
nate the positive DC level shift. The series capacitor
cannot truly level-shift a video signal because the aver-
age level of the video varies with picture content. The
series capacitor biases the video output signal around
ground, but the actual level of the video signal can vary
significantly depending upon the RC time constant and
the picture content.
The series capacitor creates a highpass filter. Since the
lowest frequency in video is the frame rate, which can be
from 24Hz to 30Hz, the pole of the highpass filter should
ideally be an order of magnitude lower in frequency than
the frame rate. Therefore, the series capacitor must be
very large, typically from 220µF to 3000µF. For space-
constrained equipment, the series capacitor is unac-
ceptable. Changing from a single-series capacitor to a
SAG network that requires two smaller capacitors only
reduces space and cost slightly.
The series capacitor in the usual output connection
also prevents damage to the output amplifier if the con-
nector is shorted to a supply or to ground. While the
output connection of the MAX9516 does not have a
series capacitor, the MAX9516 will not be damaged if
the connector is shorted to a supply or to ground (see
the Short-Circuit Protection section).
If the full-scale video signal from a video DAC is
250mV, the black level of the video signal created by
the video DAC is approximately 75mV. The MAX9516
shifts the black level to near ground at the output so
that the active video is above ground and the sync is
below ground. The amplifier needs a negative supply
for its output stage to remain in its linear region when
driving sync below ground.
for normal operation.
FUNCTION
Pin Description
Video Amplifier
7